49447698989 has 8 divisors (see below), whose sum is σ = 54690594840. Its totient is φ = 44410406976.

The previous prime is 49447698983. The next prime is 49447698991. The reversal of 49447698989 is 98989674494.

It can be written as a sum of positive squares in 4 ways, for example, as 18486481225 + 30961217764 = 135965^2 + 175958^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 49447698989 - 2⁴ = 49447698973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49447698983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51400454 + ... + 51401415.

It is an arithmetic number, because the mean of its divisors is an integer number (6836324355).

Almost surely, 2^49447698989 is an apocalyptic number.

It is an amenable number.

49447698989 is a deficient number, since it is larger than the sum of its proper divisors (5242895851).

49447698989 is a wasteful number, since it uses less digits than its factorization.

49447698989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102801919.

The product of its digits is 1128701952, while the sum is 77.

The spelling of 49447698989 in words is "forty-nine billion, four hundred forty-seven million, six hundred ninety-eight thousand, nine hundred eighty-nine".